Sume2

#include <fstream>
#define Nmax 100001
using namespace std;
ifstream f("sume2.in");
ofstream g("sume2.out");
int N,v,M,i,j;
long long S[Nmax];

int main()
{
    f>>N;
    for(i=1;i<=N;++i)
        f>>v,S[i]=S[i-1]+v;
    f>>M;
    while(M--)
        f>>i>>j,g<<S[j]-S[i-1]<<'\n';
    return 0;
}